---
layout: example
category: example
title: Display buildings in 3D
description: Use extrusions to display buildings' height in 3D
tags:
  - layers
---
<div id='map'></div>
<script>
var map = new mapboxgl.Map({
    style: 'mapbox://styles/mapbox/light-v9',
    center: [-74.0066, 40.7135],
    zoom: 15,
    pitch: 45,
    bearing: -17.6,
    container: 'map'
});

// the 'building' layer in the mapbox-streets vector source contains building-height
// data from OpenStreetMap.
map.on('load', function() {
    map.addLayer({
        'id': '3d-buildings',
        'source': 'composite',
        'source-layer': 'building',
        'filter': ['==', 'extrude', 'true'],
        'type': 'fill-extrusion',
        'minzoom': 15,
        'paint': {
            'fill-extrusion-color': '#aaa',
            'fill-extrusion-height': {
                'type': 'identity',
                'property': 'height'
            },
            'fill-extrusion-base': {
                'type': 'identity',
                'property': 'min_height'
            },
            'fill-extrusion-opacity': .6
        }
    });
});
</script>
